3 - St. Mary's fire

A lamp that was left on ignited nearby combustible materials to spark the blaze.

Amarillo Fire Marshal's investigators, along with agents from the Bureau of Alcohol, Tobacco, Firearms and Explosives, ruled out criminal activity in connection with the blaze by March 2.

The fire caused an estimated $5 million in damage to the church at 1200 S. Washington St.

The investigation into its cause included about 25 investigators with the ATF's National Response Team. The team responds to fires that cause at least $1 million in damage or a death, or require more resources than local authorities can muster to investigate.